Trait ViewElement

pub trait ViewElement: Sized {
    // Required method
    fn bytes_as_slice<'a>(
        bytes: &'a [u8],
        type_desc: &PyValue,
        len: usize,
    ) -> Result<&'a [Self], ViewDataError>;
}

An array element type that can be viewed (without copying) in an .npy file.

Required Methods

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &PyValue, len: usize, ) -> Result<&'a [Self], ViewDataError>

Casts bytes into a slice of elements of length len.

Returns Err(_) in at least the following cases:

• if the type_desc does not match Self with native endianness
• if the bytes slice is misaligned for elements of type Self
• if the bytes slice is too short for len elements
• if the bytes slice has extra bytes after len elements

May panic if len * size_of::<Self>() overflows.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl ViewElement for bool

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &PyValue, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for f32

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &Value, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for f64

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &Value, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for i8

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &PyValue, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for i16

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &Value, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for i32

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &Value, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for i64

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &Value, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for u8

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &PyValue, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for u16

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &Value, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for u32

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &Value, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for u64

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &Value, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for Complex<f32>

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &Value, len: usize, ) -> Result<&'a [Self], ViewDataError>

impl ViewElement for Complex<f64>

fn bytes_as_slice<'a>( bytes: &'a [u8], type_desc: &Value, len: usize, ) -> Result<&'a [Self], ViewDataError>

Implementors